کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1265015 972189 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Parallel H-shaped phenylenevinylenes: Quasi-coplanar molecules for highly luminescent blue OLEDs
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Parallel H-shaped phenylenevinylenes: Quasi-coplanar molecules for highly luminescent blue OLEDs
چکیده انگلیسی

For highly luminescent solid-state applications, the twisted or spiro-configured conjugated molecules are mostly considered as the proper choices because the coplanar ones usually have intensively intermolecular π–π interactions, which lead to fluorescence quenching and red-shift. In this study, the two prepared parallel H-shaped phenylenevinylenes with coplanar configuration show the special case. Due to their characteristics of multi-branches, these coplanar multi-branched molecules prefer to form stable amorphous morphology in thin films were verified by the XRDs and AFM. The amorphous thin films show very weak intermolecular actions, with intrinsic differences on both steady and transient optical properties from the crystalline states. The non-doped electroluminescent devices based on them show highly luminescent blue emissions. Both their luminance (20490 cd m−2) and efficiency (2.8 cd A−1/2.6 lm W−1) are comparable with the performances of the cross dimeric OPVs which have similar constructing blocks to the H-shaped molecules and with the same EL device configurations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 10, Issue 6, September 2009, Pages 1082–1090
نویسندگان
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